Cable management device and coupling assembly for rack system

ABSTRACT

A cable management device includes a first cable management arm, a second cable management arm and an auxiliary member. The second cable management arm is movable relative to the first cable management arm. The auxiliary member can be moved with respect to one of the first cable management arm and the second cable management arm from a first position to a second position, so as to increase a length of the cable management device.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a cable management device and acoupling assembly, and more particularly, to a cable management deviceand a coupling assembly for rack system.

2. Description of the Prior Art

As shown in FIG. 1 and FIG. 2, slide rail assemblies 102, 104 aremounted on two opposite sides of an electronic apparatus 100 in a racksystem. The slide rail assemblies 102, 104 aid the electronic apparatus100 to be mounted on a rack 106, such that the electronic apparatus 100is able to be pulled from inside the rack 106 along a direction D, or beretracted from outside the rack 106. In general, the electronicapparatus 100 is equipped with cables. When the electronic apparatus 100is pulled from inside the rack 106 via rails of the slide railassemblies 102, 104 or retraced from outside the rack 106, a cablemanagement device 108 for arranging or storing the cables is needed, soas to keep the cables neat during the electronic apparatus 100 beingpulled or retracted. The conventional cable management device 108includes at least two sections of cable management arms 108 a, 108 b.The cable management arms 108 a, 108 b are pivoted to each other to beretracted with respect to each other, as shown in FIG. 1, or to beexpanded with respect to each other, as shown in FIG. 2.

However, as shown in FIG. 1, since a size of the rack 106 (or a cabinet)and/or the electronic apparatus 100 is predetermined, it causes space Sbehind the rack 106 or the electronic apparatus 100 to be limited in aspecific scale. As a result, in order for containing the cablemanagement arms 108 a, 108 b in the limited space S, a size of the cablemanagement arms 108 a, 108 b is limited as well, which constrains alength of the cable management arms 108 a, 108 b in an expanded status.

Furthermore, when a longer length of the cable management device 108 inthe expanded status is required, an additional cable management arm isused for being pivoted to one of the two sections of cable managementarms 108 a, 108 b of the conventional cable management device 108, sothat the cable management device 108 with the two sections of cablemanagement arms 108 a, 108 b and the additional cable management arm isto be a cable management device with three sections of cable managementarms. However, when the cable management device with three sections ofcable management arms is retracted with respect to one another, a wholevolume of the cable management device with three sections of cablemanagement arms will exceed the limited space S and fail to match therack system.

Accordingly, under the constraint on the limited space, how to develop acable management device without occupying space and with capability ofincreasing an expanded length thereof has become an issue.

SUMMARY OF THE INVENTION

The present invention provides a cable management device with adjustablelength thereof and a coupling assembly.

According to an embodiment of the present invention, a cable managementdevice includes a first cable management arm, a second cable managementarm and an auxiliary member. The second cable management arm is movablerelative to the first cable management arm. The auxiliary member isextendable and retractable relative to one of the first cable managementarm and the second cable management arm.

Preferably, the one of the first cable management arm and the secondcable management arm includes a guiding feature, and the guiding featurefacilitates movement of the auxiliary member.

Preferably, the cable management device further includes a firstconnecting member. The first connecting member is movably connected tothe auxiliary member and configured to connect the cable managementdevice with a first target object.

Preferably, the cable management device further includes a secondconnecting member. The second connecting member is movably connected tothe other one of the first cable management arm and the second cablemanagement arm and configured to connect the cable management devicewith a second target object.

Preferably, the first connecting member is pivoted to an end portion ofthe auxiliary member, and the second connecting member is pivoted to anend portion of the other one of the first cable management arm and thesecond cable management arm.

Preferably, at least one of the first cable management arm and thesecond cable management arm includes a cable holding feature.

Preferably, the first cable management arm and the second cablemanagement arm are pivoted to each other.

Preferably, the cable management device further includes at least onesupporting member. The at least one supporting member is configured tosupport one of the first cable management arm and the second cablemanagement arm.

According to an embodiment of the present invention, a coupling assemblyincludes a first slide rail assembly and a first cable managementdevice. The first slide rail assembly includes a first rail and a secondrail, and the first rail and the second rail are movable relative toeach other. The first cable management device includes a first cablemanagement arm, a second cable management arm and an auxiliary member.The second cable management arm is pivotable relative to the first cablemanagement arm. The auxiliary member is movable along a length directionof one of the first cable management arm and the second cable managementarm. The auxiliary member is configured to being connected to the firstrail. The other one of the first cable management arm and the secondcable management arm is configured to being connected to the secondrail.

Preferably, the coupling assembly further includes a second slide railassembly and a second cable management device. The second slide railassembly includes a third rail and a fourth rail, and the third rail andthe fourth rail are movable relative to each other. The second cablemanagement device includes a third cable management arm, a fourth cablemanagement arm, an aiding member and a third connecting member. Thefourth cable management arm is pivotable relative to the third cablemanagement arm. The aiding member is movable along a length direction ofone of the third cable management arm and the fourth cable managementarm. The third connecting member is movably connected to the aidingmember, and the aiding member is connected to the third rail by thethird connecting member.

Preferably, the coupling assembly further includes a fourth connectingmember. The fourth connecting member is movably connected to the otherone of the third cable management arm and the fourth cable managementarm. The other one of the third cable management arm and the fourthcable management arm is connected to the fourth rail by the fourthconnecting member. The third connecting member is pivoted to an endportion of the aiding member, and the fourth connecting member ispivoted to an end portion of the other one of the third cable managementarm and the fourth cable management arm.

Preferably, the auxiliary member is connected to the first rail by afirst connecting bracket. The other one of the first cable managementarm and the second cable management arm is connected to the second railby a second connecting bracket. The at least one supporting member isconnected to the fourth rail by a third connecting bracket. The firstconnecting bracket, the second connecting bracket and the thirdconnecting bracket have a predetermined height with respect to a lengthdirection of the first slide rail assembly.

According to another embodiment of the present invention, a cablemanagement device includes a first cable management arm, a second cablemanagement arm and an auxiliary member and an auxiliary member. Thesecond cable management arm is movable relative to the first cablemanagement arm. The auxiliary member is movable from a first position toa second position with respect to the first cable management arm, so asto increase a length of the cable management device.

These and other objectives of the present invention will no doubt becomeobvious to those of ordinary skill in the art after reading thefollowing detailed description of the preferred embodiment that isillustrated in the various figures and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram illustrating a conventional cable management deviceimplemented in a rack system and with two cable management arms in aretracted status.

FIG. 2 is a diagram illustrating the conventional cable managementdevice implemented in the rack system and with the two cable managementarms in an expanded status.

FIG. 3 is a schematic diagram of a rack system according to anembodiment of the present invention.

FIG. 4 is an exploded diagram illustrating two slide rail assemblieswith respect to two cable management devices of the rack systemaccording to the embodiment of the present invention.

FIG. 5 is an exploded diagram of the cable management device accordingto the embodiment of the present invention.

FIG. 6 is a diagram illustrating an auxiliary member of the cablemanagement device in a retracted status with respect to a cablemanagement arm according to the embodiment of the present invention.

FIG. 7 is a diagram illustrating the auxiliary member of the cablemanagement device in an expanded status with respect to the cablemanagement arm according to the embodiment of the present invention.

FIG. 8 is a diagram illustrating a carried object being pulled relativeto a rack from a retracted position to a first expanded positionaccording to the embodiment of the present invention.

FIG. 9 is a diagram illustrating the carried object being further pulledrelative to the rack to a second expanded position according to theembodiment of the present invention.

DETAILED DESCRIPTION

As shown in FIG. 3 and FIG. 4, a rack system in an embodiment of thepresent invention includes a rack 20, a first slide rail assembly 24, asecond slide rail assembly 30 and a carried object 36. The rack 20 has afirst side 22 a and a second side 22 b. The first slide rail assembly 24is mounted to the first side 22 a of the rack 20. The first slide railassembly 24 at least includes a first rail 26 and a second rail 28. Thefirst rail 26 and the second rail 28 are movable relative to each other.The second rail 28 being securely mounted to the first side 22 a of therack 20 and the first rail 26 being movable relative to the second rail28 is illustrative of an example hereinafter. The second slide railassembly 30 is mounted to the second side 22 b of the rack 20, and thesecond slide rail assembly 30 is oriented substantially parallel to thefirst slide rail assembly 24. The second slide rail assembly 30 at leastincludes a third rail 32 and a fourth rail 34. The third rail 32 and thefourth rail 34 are movable relative to each other. The fourth rail 34being securely mounted to the second side 22 b of the rack 20 and thethird rail 32 being movable relative to the fourth rail 34 isillustrative of an example hereinafter. The carried object 36 isillustrative of including a hard disk drive, a power distribution unit,and/or other electronic components. The carried object 36 is mountedbetween the first slide rail assembly 24 and the second slide railassembly 30. As shown in FIG. 8 and FIG. 9, the carried object 36 ismovable relative to the rack 20 from a retracted position R to anexpanded position via the first rail 26 of the first slide rail assembly24 and the third rail 32 of the second slide rail assembly 30. A firstcable management device 38 includes a first cable management arm 40 anda second cable management arm 42. The second cable management arm 42 ismovable relative to the first cable management arm 40. Preferably, asecond cable management device 44 includes a third cable management arm46 and a fourth cable management arm 48. The fourth cable management arm48 is movable relative to the third cable management arm 46.

Preferably, at least one first supporting member 50 and at least onesecond supporting member 52 are respectively configured to support thefirst cable management device 38 and the second cable management device44.

Preferably, a first connecting bracket 54 is connected to the first rail26, a second connecting bracket 56 is connected to the second rail 28, athird connecting bracket 58 is connected to the fourth rail 34 and afourth connecting bracket 60 is connected to the third rail 32. Theaforementioned connecting brackets (i.e., the first connecting bracket54, the second connecting bracket 56, the third connecting bracket 58and the fourth connecting bracket 60) have a predetermined height withrespect to a length direction of the first slide rail assembly 24 (orwith respect to a length direction of the second slide rail assembly30), wherein the length direction is defined by a direction along whichthe rail of the slide rail assembly extends or is oriented. Furthermore,the first connecting bracket 54 has an upper portion 55 a and a lowerportion 55 b. The second connecting bracket 56 has an upper portion 57 aand a lower portion 57 b. The third connecting bracket 58 has an upperportion 59 a and a lower portion 59 b. The fourth connecting bracket 60has an upper portion 61 a and a lower portion 61 b. Preferably, theaforementioned connecting brackets (i.e., the first connecting bracket54, the second connecting bracket 56, the third connecting bracket 58and the fourth connecting bracket 60) are respectively securelyconnected to the aforementioned rails (i.e., the first rail 26, thesecond rail 28, the fourth rail 34 and the third rail 32). Accordingly,the first connecting bracket 54 can be regarded as a portion of thefirst rail 26, the second connecting bracket 56 can be regarded as aportion of the second rail 28, the third connecting bracket 58 can beregarded as a portion of the fourth rail 34, and the fourth connectingbracket 60 can be regarded as a portion of the third rail 32.

Furthermore, the first cable management device 38 includes an auxiliarymember 62, and the auxiliary member 62 is extendable and retractablerelative to one of the first cable management arm 40 and the secondcable management arm 42. The auxiliary member 62 being extendably andretractably connected to the first cable management arm 40 isillustrative of an example hereinafter, but the present invention is notlimited thereto. For example, the auxiliary member 62 can be extendablyand retractably connected to the second cable management arm 42 as well,and it depends on practical demands.

Preferably, the first cable management device 38 further includes afirst connecting member 64. The first connecting member 64 is configuredto be connected to a first target object. For example, the auxiliarymember 62 is detachably connected to one of the carried object 36 andthe first rail 26 of the first slide rail assembly 24 by utilizing thefirst connecting member 64. In the present embodiment, the auxiliarymember 62 is detachably connected to the upper portion 55 a of the firstconnecting bracket 54 by the first connecting member 64, such that thefirst cable management arm 40 is mounted to the first rail 26 and hasthe predetermined height relative to the first rail 26. Furthermore, thefirst connecting bracket 54 can be mounted on the carried object 36 aswell, and the present invention is not limited thereto.

The first cable management arm 40 and the second cable management arm 42are moved to be expanded relative to each other, as shown in FIG. 8 andFIG. 9, or retracted relative to each other, as shown in FIG. 1. Thesecond cable management arm 42 is connected to a second target object bya second connecting member 66. For example, the second connecting member66 is detachably connected to one of the rack 20 and the second rail 28of the first slide rail assembly 24. In the present embodiment, thesecond cable management arm 42 is detachably connected to the upperportion 57 a of the second connecting bracket 56 by utilizing the secondconnecting member 66, such that the second cable management arm 42 ismounted to the second rail 28 and has the predetermined height relativeto the second rail 28. Furthermore, the second connecting bracket 56 canbe mounted on the rack 20, and the present invention is not limitedthereto.

A first connecting portion 51 of the at least one first supportingmember 50 is detachably connected to the upper portion 59 a of the thirdconnecting bracket 58, such that the at least one first supportingmember 50 is mounted to the fourth rail 34 and has the predeterminedheight relative to the fourth rail 34. In the present embodiment, the atleast one first supporting member 50 including two linking membersextendable and retractable relative to each other is illustrative as anexample.

For example, as shown in FIG. 4 to FIG. 9, the first supporting member50 includes a first linking member 501, a second linking member 502 anda sliding base 503. An end of the first linking member 501 is pivoted tothe first connecting portion 51. The second linking member 502 isextendably and retractably coupled with the first linking member 501.The sliding base 503 is slidably mounted on the second linking member502 and pivoted to a connecting base 78, which is configured to connectthe first cable management arm 40 with the second cable management arm42. No matter when the first cable management arm 40 and the secondcable management arm 42 are expanded relative to each other from a firstexpanded position E1 shown in FIG. 8 to a second expanded position E2shown in FIG. 9 or when the first cable management arm 40 and the secondcable management arm 42 are retracted relative to each other from thesecond expanded position E2 shown in FIG. 9 to the first expandedposition E1 shown in FIG. 8, the sliding base 503 is driven to slide onthe second linking member 502 in a longitudinal direction along whichthe second linking member 502 is oriented by the connecting base 78.Accordingly, the first supporting member 50 is able to utilize thesliding base 503 for supporting the first cable management device 38during an expanded process and/or a retracted process of the first cablemanagement arm 40 and the second cable management arm 42 and further toenhance stability of movement of the first cable management arm 40 andthe second cable management arm 42 during the aforesaid expanded processand/or the retracted process.

In addition, the first supporting member 50 can include a stopping pin504. The stopping pin 504 is disposed at an end of the second linkingmember 502 which is opposite to the first linking member 501. When thefirst cable management arm 40 and the second cable management arm 42 areexpanded relative to each other to the second expanded position shown inFIG. 9, the stopping pin 504 is configured to stop the sliding base 503for preventing the sliding base 503 from being separate from the secondlinking member 502.

On the other hand, the second cable management device 44 is structurallysubstantially identical to the first cable management device 38. Forexample, the second cable management device 44 includes a thirdconnecting member 68. The third connecting member 68 is movablyconnected to an aiding member 71, as shown in FIG. 8 and FIG. 9. Thethird connecting member 68 is detachably connected to one of the carriedobject 36 and the third rail 32 of the second slide rail assembly 30. Inthe present embodiment, the third connecting member 68 is detachablyconnected to the lower portion 61 b of the fourth connecting bracket 60,so as to mount the third cable management arm 46 to the third rail 32.In another embodiment, the fourth connecting bracket 60 can be mountedon the carried object 36 as well, and the present invention is notlimited thereto.

The third cable management arm 46 and the fourth cable management arm 48are moved to be expanded relative to each other, as shown in FIG. 8 andFIG. 9, or to be retracted relative to each other, as shown in FIG. 1.The fourth cable management arm 48 is detachably connected to one of therack 20 and the fourth rail 34 of the second slide rail assembly 30 by afourth connecting member 70. In the present embodiment, the fourth cablemanagement arm 48 is detachably connected to the lower portion 59 b ofthe third connecting bracket 58 by utilizing the fourth connectingmember 70, such that the fourth cable management arm 48 is mounted tothe fourth rail 34. Furthermore, the third connecting bracket 58 can bemounted on the rack 20, but the present invention is not limitedthereto.

A second connecting portion 53 of the at least one second supportingmember 52 is detachably connected to the lower portion 57 b of thesecond connecting bracket 56, such that the at least one secondsupporting member 52 is mounted to the second rail 28. In the presentembodiment, the at least one second supporting member 52 including twolinking members extendable and retractable relative to each other isillustrative as an example. The structures of the second supportingmember 52 are identical to those of the first supporting member 50, anddetailed description is omitted herein for simplicity.

According to the abovementioned configuration, the first cablemanagement device 38 is located above the second cable management device44. In other words, the first cable management devices 38 and the secondcable management device 44 are respectively located on an upper layerand a lower layer of the rack system and configured to arrange orcontain cables behind the carried object 36, wherein the first sliderail assembly 24 and the first cable management device 38 (or the secondslide rail assembly 30 and the second cable management device 44)cooperatively form a coupling assembly.

As shown in FIG. 5 and FIG. 6, the first cable management arm includes aguiding feature 74. Preferably, the first cable management arm 40includes a first wall 76 a, a second wall 76 b and a side wall 76 c. Theside wall 76 c is connected between the first wall 76 a and the secondwall 76 b, and the first wall 76 a, the second wall 76 b and the sidewall 76 c cooperatively define the guiding feature 74 as a passage. Onthe other hand, the auxiliary member 62 has a length, and the guidingfeature 74 facilitates movement of the auxiliary member 62.

In an alternative embodiment, it should be noticed that the auxiliarymember 62 is in cooperation with the first cable management arm 40 via along hole (or a long slot) versus a protrusion, such that the auxiliarymember 62 is movable relative to the first cable management arm 40, butthe present invention is not limited thereto.

Preferably, the first cable management arm 40 and the second cablemanagement arm 42 are pivoted to each other, so that the first cablemanagement arm 40 pivots relative to the second cable management arm 42.For example, the first cable management arm 40 and the second cablemanagement arm 42 are pivoted to each other via a connecting base 78. Inpractical application, the first cable management arm 40 and the secondcable management arm 42 are pivoted to the connecting base 78 via twopins 80 a, 80 b, respectively, wherein the connecting base 78 isarranged between the first cable management arm 40 and the second cablemanagement arm 42. Alternatively, in another embodiment, the first cablemanagement arm 40 and the second cable management arm 42 can be pivotedto each other at ends thereof without utilizing the connecting base 78,but the present invention is not limited thereto. Preferably, the firstcable management arm 40, the second cable management arm 42 and/or theconnecting base 78 include(s) a cable holding feature 82. The cableholding feature 82 is configured to contain the cables of the aforesaidcarried object 36.

Furthermore, the first connecting member 64 is movably connected to theauxiliary member 62, and the second connecting member 66 is movablyconnected to one of the first cable management arm 40 and the secondcable management arm 42. For example, the second connecting member 66 isillustrative of being movably connected to the second cable managementarm 42. Preferably, the first connecting member 64 is pivoted to an endportion of the auxiliary member 62, and the second connecting member 66is pivoted to an end portion of the second cable management arm 42. Onthe other hand, the at least one first supporting member 50 supports abottom portion of the first cable management device 38. Hereinafter, itis illustrative of an example that the at least one first supportingmember 50 is movably configured on the bottom portion of the connectingbase 78, so as to support the first cable management arm 40 and thesecond cable management arm 42.

As shown in FIG. 6 and FIG. 7, the auxiliary member 62 is movable alonga length direction of the first cable management arm 40. In practicalapplication, the auxiliary member 62 is able to be moved relative to thefirst cable management arm 40 between a first position P1 and a secondposition P2, so that the auxiliary member 62 is able to be in aretracted status or in an extended status relative to the first cablemanagement arm 40. Preferably, two constraint features are utilized forallowing the auxiliary member 62 to be able to be moved only between thefirst position P1 and the second position P2. When the auxiliary member62 is moved to a position e.g., the second position P2, a whole lengthof the first cable management device 38 can be increased.

As shown in FIG. 8, when the first rail 26 and the third rail 32 aremoved relative to the second rail 28 and the fourth rail 34 from theaforesaid retracted position R to a first expanded position E1 along adirection D, the carried object 36 is moved to the first expandedposition E1 relative to the rack 20 by the first rail 26 and the thirdrail 32 as well.

During the aforementioned process, the first cable management arm 40 andthe second cable management arm 42 of the first cable management device38 pivot to be gradually expanded relative to each other, and theauxiliary member 62 is moved to a position, e.g., the aforesaid secondposition P2, relative to the first cable management arm 40. Moreover,the at least one first supporting member 50 is configured to support oneof the first cable management arm 40 and the second cable management arm42. Namely, the third cable management arm 46 and the fourth cablemanagement arm 48 of the second cable management device 44 pivot to begradually expanded relative to each other as well, and the aiding member71 is moved relative to the third cable management arm 46 along a lengthdirection of the third cable management arm 46. Moreover, the at leastone second supporting member 52 is configured to support one of thethird cable management arm 46 and the fourth cable management arm 48.

As shown in FIG. 9, when the first rail 26 and the third rail 32 arerespectively moved relative to the second rail 28 and the fourth rail 34from the aforesaid first expanded position E1 to a second expandedposition E2 along the direction D, the carried object 36 is furthermoved to the second expanded position E2 relative to the rack 20 by thefirst rail 26 and the third rail 32.

The first cable management arm 40 and the second cable management arm 42of the first cable management device 38 pivot to be expanded relative toeach other. Namely, the third cable management arm 46 and the fourthcable management arm 48 of the second cable management device 44 pivotto be expanded relative to each other as well.

Preferably, the first slide rail assembly 24 and the second slide railassembly 30 further include a middle rail 27, respectively. The middlerail 27 is configured to enhance displacement of the first rail 26relative to the second rail 28 as well as displacement of the third rail32 relative to the fourth rail 34.

As mentioned above, the cable management device and the couplingassembly in the embodiment of the present invention are advantageous inthe following perspective that the cable management device 38 includesthe auxiliary member 62, which can be in the retracted status or in theexpanded status relative to the first cable management arm 40.Furthermore, the auxiliary member 62 in the retracted status allows thecable management device 38 not to occupy space, e.g., not to occupy thespace behind the slide rail assembly, the carried object or the rack,when the first cable management arm 40 and the second cable managementarm 42 are retracted relative to each other. Furthermore, the auxiliarymember 62 in the expanded status is able to increase the whole length ofthe cable management device 38 for satisfying requirement of longerdisplacement or other requirements related to the length.

Those skilled in the art will readily observe that numerousmodifications and alterations of the device and method may be made whileretaining the teachings of the invention. Accordingly, the abovedisclosure should be construed as limited only by the metes and boundsof the appended claims.

What is claimed is:
 1. A coupling assembly, comprising: a first sliderail assembly comprising a first rail and a second rail, the first railand the second rail being movable relative to each other; a first cablemanagement device, comprising: a first cable management arm; a secondcable management arm pivotable relative to the first cable managementarm, the first cable management arm and the second cable management armbeing pivoted to each other by a connecting base; and an auxiliarymember movable along a length direction of one of the first cablemanagement arm and the second cable management arm; wherein theauxiliary member is connected to the first rail by a first connectingbracket; wherein the other one of the first cable management arm and thesecond cable management arm is connected to the second rail by a secondconnecting bracket; a second slide rail assembly comprising a third railand a fourth rail, the third rail and the fourth rail being movablerelative to each other; a second cable management device, comprising: athird cable management arm; a fourth cable management arm pivotablerelative to the third cable management arm; an aiding member movablealong a length direction of one of the third cable management arm andthe fourth cable management arm; and a third connecting member movablyconnected to the aiding member, and the aiding member being connected tothe third rail by the third connecting member; and at least onesupporting member configured to support one of the first cablemanagement arm and the second cable management arm, the at least onesupporting member being connected to the fourth rail by a thirdconnecting bracket; wherein the first slide rail assembly is configuredto be mounted to a first side of a rack, and the second slide railassembly is configured to be mounted to a second side of the rackopposite to the first side of the rack; wherein the first connectingbracket, the second connecting bracket and the third connecting brackethave a predetermined height with respect to a length direction of thefirst slide rail assembly.
 2. The coupling assembly of claim 1, whereinthe one of the first cable management arm and the second cablemanagement arm comprises a guiding feature, and the guiding featurefacilitates movement of the auxiliary member.
 3. The coupling assemblyof claim 1, further comprising: a first connecting member movablyconnected to the auxiliary member and configured to connect theauxiliary member with the first rail.
 4. The coupling assembly of claim3, further comprising: a second connecting member movably connected tothe other one of the first cable management arm and the second cablemanagement arm and configured to connect the other one of the firstcable management arm and the second cable management arm with the secondrail.
 5. The coupling assembly of claim 4, wherein the first connectingmember is pivoted to an end portion of the auxiliary member, and thesecond connecting member is pivoted to an end portion of the other oneof the first cable management arm and the second cable management arm.6. The coupling assembly of claim 1, wherein at least one of the firstcable management arm and the second cable management arm comprises acable holding feature.
 7. The coupling assembly of claim 1, furthercomprising: a fourth connecting member movably connected to the otherone of the third cable management arm and the fourth cable managementarm, the other one of the third cable management arm and the fourthcable management arm being connected to the fourth rail by the fourthconnecting member, the third connecting member being pivoted to an endportion of the aiding member, and the fourth connecting member beingpivoted to an end portion of the other one of the third cable managementarm and the fourth cable management arm.